Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d3f85cf622a69c6…

MALICIOUS

PDF

78.0 KB Created: 2021-08-16 17:06:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 7ecad24057e163e077105cf19ee3a73a SHA-1: 9c4e76ee9ff25482052e5543b8d43e0aefc9f367 SHA-256: 9d3f85cf622a69c64a133861969c253ea45a1f0a5990d41ef0f0930db3c33da7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF contains numerous links, many pointing to compromised CMS upload directories, suggesting it's designed to redirect users to malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a phishing or malware distribution intent. No scripts were extracted, and the document body was unreadable, limiting further analysis of specific lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5543

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160837effef858---poniz.pdf In PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a72dc58db8c---74441201238.pdfIn PDF document text
    • http://coeb.eu/userfiles/files/99715887006.pdfIn PDF document text
    • http://trevelci.ru/ckfinder/userfiles/files/58160211421.pdfIn PDF document text
    • http://esenkardeslerinsaat.com/resimlerfiles/90522291223.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160ddc915cf541---mimovuza.pdfIn PDF document text
    • http://kleinschaden.expert/userfiles/file/97023137322.pdfIn PDF document text
    • https://acryl-bg.com/userfiles/file/43841680328.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd1cd9a30d---daxopabipelun.pdfIn PDF document text
    • https://cafesca.mx/ckfinder/userfiles/files/nabitasorufona.pdfIn PDF document text
    • https://wulf-sanitaer.de/wp-content/plugins/super-forms/uploads/php/files/hnsgdpd0pe6s7hiuf21sv5s41a/subitekobojajiwalo.pdfIn PDF document text
    • http://amtutoring.com/clients/865321/File/7248694168.pdfIn PDF document text
    • http://lnimeina.it/userfiles/files/2034196222.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16074b58449029---92972012807.pdfIn PDF document text
    • http://miet-boot.ch/images/uploadedimages/file/rigulerevosorumavip.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/ok29etehnqeupc0cekkqu6cq56/83489458852.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcc6af08f89---zedamuferedizu.pdfIn PDF document text
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072e4d17c886---jefonobi.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075da10b2937---wabirivodusesabalevafo.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/23297218187.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/6mb7ejdjdhk7cu34scf2le4gks/gabufitipevaxofaw.pdfIn PDF document text
    • http://aajude.pt/backoffice/ckfinder/userfiles/files/53055175747.pdfIn PDF document text
    • http://solee.cn/ckfinder/userfiles/files/34938891382.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/sk4ha1168pk7hfspq4taq900hf/34781706434.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=jazz+chord+chart+guitar+pdfPDF link annotation

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